HairStrandsEditor/Public/Widgets/SGroomEditorViewport.h
Material Editor Preview viewport widget
class SGroomEditorViewport : public [SEditorViewport](API\Editor\UnrealEd\SEditorViewport), public [FGCObject](API\Runtime\CoreUObject\UObject\FGCObject), public [ICommonEditorViewportToolbarInfoProvider](API\Editor\UnrealEd\ICommonEditorViewportToolbarInfo-)